<template>
  <ul>
    <li :style="{ opacity }">欢迎学习Vue</li>
    <li>news001 <input type="text" /></li>
    <li>news002 <input type="text" /></li>
    <li>news003 <input type="text" /></li>
  </ul>
</template>

<script>
export default {
  name: "News",
  data() {
    return {
      opacity: 1,
    };
  },
  /* beforeDestroy() {
			console.log('News组件即将被销毁了')
			clearInterval(this.timer)
		}, */
  /* mounted(){
			this.timer = setInterval(() => {
				console.log('@')
				this.opacity -= 0.01
				if(this.opacity <= 0) this.opacity = 1
			},16)
		}, */

  // 路由组件所独有的两个钩子，用于捕获路由组件的激活状态
  // activated路由组件被激活时触发
  activated() {
    console.log("News组件被激活了");
    this.timer = setInterval(() => {
      console.log("@");
      this.opacity -= 0.01;
      if (this.opacity <= 0) this.opacity = 1;
    }, 16);
  },

  // deactivated路由组件失活时触发
  deactivated() {
    console.log("News组件失活了");
    clearInterval(this.timer);
  },
};
</script>
